Danfoss DLX 4.6 Guia do Utilizador descarregar pdf (Página 25)

User Guide DLX Series L00410623-1 25

• The configuration of a positive grounded PV string differs from an ungrounded PV

string by the connection of the cables to the DC terminal blocks and the addition of a

grounding strap.

• Array configuration depends on the module technology used. Both the positive and

negative DC terminal blocks have three pairs of inputs, which allow three strings to be

connected in parallel. Due to the inverter having one MPP-tracker the PV power should

be identical for every string.

NOTICE

Maximum Voltage: The open circuit voltage, V

, must never exceed 600 V

under any conditions. The voltage generated by PV modules is inversely

proportional to the temperature; at lower temperatures the PV voltage increases

from the nameplate rating and at higher temperatures the PV voltage decreases

from the nameplate rating.

4.3.4.2. Stringbox

The Stringbox is attached to the bottom of the inverter, and provides PV string connection

via the wiring that runs through the plug-in connectors. A DC disconnect switch is

provided and mounted in the Stringbox.

NOTICE

Before removing the lower cover to access the connection terminals ensure that

the DC switch (if supplied) is in the OFF position, and the PV array cables are

disconnected.

Figure 4.3.7: DC disconnect switch

I = ON

0 = OFF

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Danfoss DLX 4.6 Guia do Utilizador Página 25